Related Questions

Two generators are running in parallel. One of the generators may run as motor for which of the following reasons?
A The direction of that generator is reversed
B The speed of that generator is increased
C The field of that generator is weakened
D That generator takes large share of loads
The essential condition for parallel operation of two D.C. generators is that they have
A Same kW rating
B The same operation r.p.m.
C The same drooping voltage characteristics
D Same percentage regulation
For the parallel operation of two or more D.C. compound generators, we should ensure that
A Voltage of the incoming generator should be same as that of bus bar
B Polarity of incoming generator should be same as that of bus bar
C All the series fields should be run in parallel by means of equalizer connection
D Series fields of all generators should be either on positive side or negative side of the armature
Shunt generators are most suited for stable parallel operation because of their
A rising voltage characteristics
B identical voltage characteristics
C drooping voltage characteristics
D linear voltage characteristics
Which of the following generators will be preferred if they are required to be run in parallel?
A Shunt generators
B Series generators
C Compound generators
D None of the above
When two D.C. series generators are running in parallel, an equalizer bar is used
A To increase the speed and hence generated e.m.f.
B To increase the series flux
C So that two similar machines will pass approximately equal currents to the load
D To reduce the combined effect of armature reaction of both machines
When two D.C. generators are running in parallel an equalizer bar is used
A To increase the series flux
B To increase the generated e.m.f.
C To reduce the combined effect of armature reaction of both the machines
D So that the two identical machines will pass approximately equal currents to the load
A flat-bed plotter uses a pen which moves in two directions across a piece of paper fixed on a flat-bed. Can you tell who controls the movements of this pen?
A microfilm
B microfiche
C film card
D COM
E None of the above
In case of a flat compounded generator
A Voltage generated is less than the rated voltage
B Generated voltage is proportional to the load on the generator
C Voltage remains constant irrespective of the load
D Speed varies in proportion to the load on the generator
The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.
A Same
B Less
C More
D None of these

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